Question

Why is desert region hot during day and cold at night?​

Answer 1

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Because deserts have such little water vapor in the air, it makes it harder to trap heat or cold in a desert. ... At night, the sun no longer heats the desert and the heat from the day doesn't stay trapped. Because of this, some deserts can get cold at night, dropping to below 40F, which is definitely coat weather.

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Answer 2

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It is actually sand, which turns the entire phenomenon hot. Sand cannot hold the heat. During the daytime, it stays warm, and when the Sun is absent it loses all its heat making the nights colder. There's nothing in the desert that can either absorb heat from the sun or hold it on the surface when the sun is set.

@MissTranquillity